Heating-drum



(No Model.)

J. HODGKINSON. HEATING DRUM.

Patented May 14; 1889.

UNITED STATES PATENT OFFICE.

JAMES HODGKINSON, OF MOORHEAD, MINNESOTA.

HEATING-DRUM.

SPECIFICATION forming part of Letters Patent No. 403,349, dated May 14, 1889.

Application filed February 8, 1889. Serial No. 299,165. (No model.)

To all whom it may concern.-

Be it known that I, JAMES HODGKINSON, of Moorhead, in the county of Clay and State of Minnesota, have invented a certain new and useful Improvement in Heating-Drums; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to an improvement in hot-air heating-drums.

The object of the invention is to provide an improved hot-air drum exceedingly cheap, simple, and durable in construction, and in which the heat from the hot air, gases, and other products of combustion from a stove is utilized in heating fresh air and passing the same into a room, and whereby the cold air is more quickly passed through the drum and more thoroughly and highly heated than in the old devices of this class heretofore employed, thereby more quickly heating the room. These objects are accomplished by, and my invention consists in, certain novel features of construction and combinations of parts, more fully described hereinafter, and particularly pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a detail view of two stories of a building, showing a stove on the lower floor and the drum on the upper floor, the drum and a portion of the conducting-pipe from the stove to drum being shown in section. Fig. 2 is a top plan of the drum.

In the drawings, the reference-letter a indicates a stove, and b indicates a pipe conveyin g the products of combustion upwardly from the stove to the improved drum located upon the floor above. Just before passing through the floor the pipe is provided with a horizontal portion or elbow forming the vertical portion 0, through which an inner cold-air tube or pipe, d, longitudinally extends, said pipe at its lower end opening into the atmosphere of the lower floor, and from thence extending upwardly through the smoke -pipe to the room above.

' The improved drum consists of an outer closed drum or casing, 6, oval or elliptical in cross-section, as shown in Fig. 2, an interior cylindrical casing, f, shorter than the outer casing, to leave spaces within the outer casing between the heads of the same and the head of the cylindrical casing, the diameter of the cylinder f being equal to the lesser diameter of the oval, as seen .by dotted lines in Fig. 2, thereby leaving vertical fines g 9 extending from the space 72 beneath the cylinder f to the space h above the same, the interior of said cylinder being non-communicating with the interior of the outer casing, and an inner cylinder, '2', located within the interior of cylinder f and extending the length of the same and forming an auxiliary fresh-air-heating chamber within said interior cylinder communicating with the fresh-air-heati11g chamher in the cylinder f by means of openings j through the ends of cylinder 1.

The smoke-pipe from the stove extends up through the floor and lower head of the outer casing of the drum and opens into the space h, from whence the products of combustion pass up the fines g g to the space h above the interior cylinder and from thence out through the smoke-pipej.

The fresh-air-heating space in the cylinder f is connected with the atmosphereby freshairtubes 70, extending through the lowerheads, of the interior and outer casing, and the hot air escapes from this chamber through tubes extending through the upper heads of the outer and interior casings. The fresh-air tube 01 passes up through the smoke-pipe and space h and bottom of the interior casing and opens into the interior of the inner cylinder. This cylinder is preferably constructed of bright metal, and at its upper end is provided with a convex bright-metal reflector, Z,

which throws the heated air laterally out through the aperture j in the upper end of the inner cylinder into the heating-chamber of the interior cylinder, thereby preventing the heat from escaping through the upper head of the interior cylinder and passing off up the smoke-pipe.

The drum is supportedadistance above the floor by the hollow legs m, through which the cold air passes into the tubes 10/ Each of these legs consists of a pipe at its upper end fitting into a tube, 7:, and from thence extending outwardly and downwardly and having a lower open end' and a horizontal flange, n, by which the leg is secured to the floor.

The interior cylinder within the outer oval casing closes two sides of the same, as before mentioned, forcing the products of combustion to pass laterally the tubes 79 to the passages g g, and at the upper end the hot gases also pass around the tubes 7c before passing out the smoke-pipe, thereby more thoroughly utilizing the heat than in those drums employing concentric inner and outer cylinders wherein the heat takes the most direct course and is not forced to pass around the tubes 7t 7t.

lVhat I claim is 1. A hot-air drum, in combination with a smoke-pipe connecting a stove on a lower floor and said drum, and a fresh-air tube longitudinally extending through a portion of said pipe and communicating with the atmosphere of the lower floor and opening into said drum, substantially as described.

2. A hot-air drum having a passage for the hot products of combustion therethrough, and a freslrair-hea-ting chamber therein having hot-air outlets, in combination with a smokepipe connecting a stove and said passage of the drum, and a fresh-air pipe longitudinally located in said pipe and communicating with the atmosphere at one end and opening into the fresh-air-heating chamber of the drum at its other end, substantially as described.

3. A hot-air heating-drum comprising an outer casing through which the products of combustion from a stove pass, a fresh-airheating chamber in the casing having freshair-induction openings and hot-air-eduction openings, and hollow supporting legs for the drum opening into said induction-openings, and through which fresh air is supplied to the same, substantially as described.

4. A hot-air heating-drum comprising an outer casing, an interior cylinder forming upper and lower spaces communicating by vertical flues outside of the cylinder and inside of the casing, an inner cylinder in the interior cylinder, the interior of the two cylinders communicating, a smoke-pipe opening into said lower space, an exit-pipe from said upper space, fresh-air tubes extending through the casing and said lower space into the interiqr cylinder, hot-air-exit tubes extending from the interior cylinder through said upper space to the outer air, and a fresh-air tube extending through a portion of the smokepipe and lower space into the inner cylinder, substantially as described.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses. 1

JAMES IIOD GKINSON.

itnesses:

GEo. N. LAM'PHERE, F. J. BURNHAM. 

